📄 move.bdf

📁 中频验波是对信号进行中频直接采样和数字正交处理后,产生的I 支路和Q 支路信号序列在时间上会错开一个采样间隔,需要进行定序处理,恢复成同步输出的I、Q 两路信号序列。现代雷达普遍采用相参信号处理,而如
💻 BDF
📖 第 1 页 / 共 4 页
字号:
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(line (pt 104 40)(pt 120 40)(line_width 1))
	)
	(drawing
		(text "SHIFT REG." (rect 35 161 99 175)(font "Arial" (font_size 8)))
		(line (pt 16 16)(pt 104 16)(line_width 1))
		(line (pt 16 160)(pt 16 16)(line_width 1))
		(line (pt 16 160)(pt 104 160)(line_width 1))
		(line (pt 104 160)(pt 104 16)(line_width 1))
		(circle (rect 8 132 16 140)(line_width 1))
	)
)
(symbol
	(rect 152 288 272 464)
	(text "74164" (rect 43 0 84 16)(font "Arial" (font_size 10)))
	(text "inst4" (rect 3 165 26 177)(font "Arial" ))
	(port
		(pt 0 136)
		(input)
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(line (pt 0 136)(pt 8 136)(line_width 1))
	)
	(port
		(pt 0 152)
		(input)
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(line (pt 0 152)(pt 16 152)(line_width 1))
	)
	(port
		(pt 0 72)
		(input)
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(line (pt 0 72)(pt 16 72)(line_width 1))
	)
	(port
		(pt 0 56)
		(input)
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(line (pt 0 56)(pt 16 56)(line_width 1))
	)
	(port
		(pt 120 72)
		(output)
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(line (pt 104 72)(pt 120 72)(line_width 1))
	)
	(port
		(pt 120 56)
		(output)
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(line (pt 104 56)(pt 120 56)(line_width 1))
	)
	(port
		(pt 120 24)
		(output)
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(line (pt 104 24)(pt 120 24)(line_width 1))
	)
	(port
		(pt 120 104)
		(output)
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(line (pt 104 104)(pt 120 104)(line_width 1))
	)
	(port
		(pt 120 136)
		(output)
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(line (pt 104 136)(pt 120 136)(line_width 1))
	)
	(port
		(pt 120 120)
		(output)
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(line (pt 104 120)(pt 120 120)(line_width 1))
	)
	(port
		(pt 120 88)
		(output)
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(line (pt 104 88)(pt 120 88)(line_width 1))
	)
	(port
		(pt 120 40)
		(output)
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(line (pt 104 40)(pt 120 40)(line_width 1))
	)
	(drawing
		(text "SHIFT REG." (rect 35 161 99 175)(font "Arial" (font_size 8)))
		(line (pt 16 16)(pt 104 16)(line_width 1))
		(line (pt 16 160)(pt 16 16)(line_width 1))
		(line (pt 16 160)(pt 104 160)(line_width 1))
		(line (pt 104 160)(pt 104 16)(line_width 1))
		(circle (rect 8 132 16 140)(line_width 1))
	)
)
(symbol
	(rect 424 288 544 464)
	(text "74164" (rect 43 0 84 16)(font "Arial" (font_size 10)))
	(text "inst5" (rect 3 165 26 177)(font "Arial" ))
	(port
		(pt 0 136)
		(input)
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(line (pt 0 136)(pt 8 136)(line_width 1))
	)
	(port
		(pt 0 152)
		(input)
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(line (pt 0 152)(pt 16 152)(line_width 1))
	)
	(port
		(pt 0 72)
		(input)
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(line (pt 0 72)(pt 16 72)(line_width 1))
	)
	(port
		(pt 0 56)
		(input)
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(line (pt 0 56)(pt 16 56)(line_width 1))
	)
	(port
		(pt 120 72)
		(output)
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(line (pt 104 72)(pt 120 72)(line_width 1))
	)
	(port
		(pt 120 56)
		(output)
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(line (pt 104 56)(pt 120 56)(line_width 1))
	)
	(port
		(pt 120 24)
		(output)
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(line (pt 104 24)(pt 120 24)(line_width 1))
	)
	(port
		(pt 120 104)
		(output)
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(line (pt 104 104)(pt 120 104)(line_width 1))
	)
	(port
		(pt 120 136)
		(output)
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(line (pt 104 136)(pt 120 136)(line_width 1))
	)
	(port
		(pt 120 120)
		(output)
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(line (pt 104 120)(pt 120 120)(line_width 1))
	)
	(port
		(pt 120 88)
		(output)
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(line (pt 104 88)(pt 120 88)(line_width 1))
	)
	(port
		(pt 120 40)
		(output)
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(line (pt 104 40)(pt 120 40)(line_width 1))
	)
	(drawing
		(text "SHIFT REG." (rect 35 161 99 175)(font "Arial" (font_size 8)))
		(line (pt 16 16)(pt 104 16)(line_width 1))
		(line (pt 16 160)(pt 16 16)(line_width 1))
		(line (pt 16 160)(pt 104 160)(line_width 1))
		(line (pt 104 160)(pt 104 16)(line_width 1))
		(circle (rect 8 132 16 140)(line_width 1))
	)
)
(symbol
	(rect 152 472 272 648)
	(text "74164" (rect 43 0 84 16)(font "Arial" (font_size 10)))
	(text "inst6" (rect 3 165 26 177)(font "Arial" ))
	(port
		(pt 0 136)
		(input)
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(line (pt 0 136)(pt 8 136)(line_width 1))
	)
	(port
		(pt 0 152)
		(input)
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(line (pt 0 152)(pt 16 152)(line_width 1))
	)
	(port
		(pt 0 72)
		(input)
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(line (pt 0 72)(pt 16 72)(line_width 1))
	)
	(port
		(pt 0 56)
		(input)
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(line (pt 0 56)(pt 16 56)(line_width 1))
	)
	(port
		(pt 120 72)
		(output)
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(line (pt 104 72)(pt 120 72)(line_width 1))
	)
	(port
		(pt 120 56)
		(output)
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(line (pt 104 56)(pt 120 56)(line_width 1))
	)
	(port
		(pt 120 24)
		(output)
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(line (pt 104 24)(pt 120 24)(line_width 1))
	)
	(port
		(pt 120 104)
		(output)
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(line (pt 104 104)(pt 120 104)(line_width 1))
	)
	(port
		(pt 120 136)
		(output)
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(line (pt 104 136)(pt 120 136)(line_width 1))
	)
	(port
		(pt 120 120)
		(output)
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(line (pt 104 120)(pt 120 120)(line_width 1))
	)
	(port
		(pt 120 88)
		(output)
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(line (pt 104 88)(pt 120 88)(line_width 1))
	)
	(port
		(pt 120 40)
		(output)
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(line (pt 104 40)(pt 120 40)(line_width 1))
	)
	(drawing
		(text "SHIFT REG." (rect 35 161 99 175)(font "Arial" (font_size 8)))
		(line (pt 16 16)(pt 104 16)(line_width 1))
		(line (pt 16 160)(pt 16 16)(line_width 1))
		(line (pt 16 160)(pt 104 160)(line_width 1))
		(line (pt 104 160)(pt 104 16)(line_width 1))
		(circle (rect 8 132 16 140)(line_width 1))
	)
)
(symbol
	(rect 424 472 544 648)
	(text "74164" (rect 43 0 84 16)(font "Arial" (font_size 10)))
	(text "inst7" (rect 3 165 26 177)(font "Arial" ))
	(port
		(pt 0 136)
		(input)
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(line (pt 0 136)(pt 8 136)(line_width 1))
	)
	(port
		(pt 0 152)
		(input)
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(line (pt 0 152)(pt 16 152)(line_width 1))
	)
	(port
		(pt 0 72)
		(input)
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(line (pt 0 72)(pt 16 72)(line_width 1))
	)
	(port
		(pt 0 56)
		(input)
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(line (pt 0 56)(pt 16 56)(line_width 1))
	)
	(port
		(pt 120 72)
		(output)
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(line (pt 104 72)(pt 120 72)(line_width 1))
	)
	(port
		(pt 120 56)
		(output)
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(line (pt 104 56)(pt 120 56)(line_width 1))
	)
	(port
		(pt 120 24)
		(output)
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(line (pt 104 24)(pt 120 24)(line_width 1))
	)
	(port
		(pt 120 104)
		(output)
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(line (pt 104 104)(pt 120 104)(line_width 1))
	)
	(port
		(pt 120 136)
		(output)
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(line (pt 104 136)(pt 120 136)(line_width 1))
	)
	(port
		(pt 120 120)
		(output)
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(line (pt 104 120)(pt 120 120)(line_width 1))
	)
	(port
		(pt 120 88)
		(output)
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(line (pt 104 88)(pt 120 88)(line_width 1))
	)
	(port
		(pt 120 40)
		(output)
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(line (pt 104 40)(pt 120 40)(line_width 1))
	)
	(drawing
		(text "SHIFT REG." (rect 35 161 99 175)(font "Arial" (font_size 8)))
		(line (pt 16 16)(pt 104 16)(line_width 1))
		(line (pt 16 160)(pt 16 16)(line_width 1))
		(line (pt 16 160)(pt 104 160)(line_width 1))
		(line (pt 104 160)(pt 104 16)(line_width 1))
		(circle (rect 8 132 16 140)(line_width 1))
	)
)
(symbol
	(rect 152 656 272 832)
	(text "74164" (rect 43 0 84 16)(font "Arial" (font_size 10)))
	(text "inst8" (rect 3 165 26 177)(font "Arial" ))
	(port
		(pt 0 136)
		(input)
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(line (pt 0 136)(pt 8 136)(line_width 1))
	)
	(port
		(pt 0 152)
		(input)
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(line (pt 0 152)(pt 16 152)(line_width 1))
	)
	(port
		(pt 0 72)
		(input)
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(line (pt 0 72)(pt 16 72)(line_width 1))
	)
	(port
		(pt 0 56)
		(input)
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(line (pt 0 56)(pt 16 56)(line_width 1))
	)
	(port
		(pt 120 72)
		(output)
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(line (pt 104 72)(pt 120 72)(line_width 1))
	)
	(port
		(pt 120 56)
		(output)
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(line (pt 104 56)(pt 120 56)(line_width 1))
	)
	(port
		(pt 120 24)
		(output)
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(line (pt 104 24)(pt 120 24)(line_width 1))
	)
	(port
		(pt 120 104)
		(output)
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(line (pt 104 104)(pt 120 104)(line_width 1))
	)
	(port
		(pt 120 136)
		(output)
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(line (pt 104 136)(pt 120 136)(line_width 1))
	)
	(port
		(pt 120 120)
		(output)
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(line (pt 104 120)(pt 120 120)(line_width 1))
	)
	(port
		(pt 120 88)
		(output)
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(text "QE" (rect 85 80 101 94)(font "Arial" (font_size 8)))
		(line (pt 104 88)(pt 120 88)(line_width 1))
	)
	(port
		(pt 120 40)
		(output)
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(text "QB" (rect 85 32 102 46)(font "Arial" (font_size 8)))
		(line (pt 104 40)(pt 120 40)(line_width 1))
	)
	(drawing
		(text "SHIFT REG." (rect 35 161 99 175)(font "Arial" (font_size 8)))
		(line (pt 16 16)(pt 104 16)(line_width 1))
		(line (pt 16 160)(pt 16 16)(line_width 1))
		(line (pt 16 160)(pt 104 160)(line_width 1))
		(line (pt 104 160)(pt 104 16)(line_width 1))
		(circle (rect 8 132 16 140)(line_width 1))
	)
)
(symbol
	(rect 424 656 544 832)
	(text "74164" (rect 43 0 84 16)(font "Arial" (font_size 10)))
	(text "inst9" (rect 3 165 26 177)(font "Arial" ))
	(port
		(pt 0 136)
		(input)
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(text "CLRN" (rect 22 128 53 142)(font "Arial" (font_size 8)))
		(line (pt 0 136)(pt 8 136)(line_width 1))
	)
	(port
		(pt 0 152)
		(input)
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(text "CLK" (rect 22 144 45 158)(font "Arial" (font_size 8)))
		(line (pt 0 152)(pt 16 152)(line_width 1))
	)
	(port
		(pt 0 72)
		(input)
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(text "B" (rect 21 65 29 79)(font "Arial" (font_size 8)))
		(line (pt 0 72)(pt 16 72)(line_width 1))
	)
	(port
		(pt 0 56)
		(input)
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(text "A" (rect 21 49 30 63)(font "Arial" (font_size 8)))
		(line (pt 0 56)(pt 16 56)(line_width 1))
	)
	(port
		(pt 120 72)
		(output)
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(text "QD" (rect 85 64 102 78)(font "Arial" (font_size 8)))
		(line (pt 104 72)(pt 120 72)(line_width 1))
	)
	(port
		(pt 120 56)
		(output)
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(text "QC" (rect 85 48 102 62)(font "Arial" (font_size 8)))
		(line (pt 104 56)(pt 120 56)(line_width 1))
	)
	(port
		(pt 120 24)
		(output)
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(text "QA" (rect 85 17 103 31)(font "Arial" (font_size 8)))
		(line (pt 104 24)(pt 120 24)(line_width 1))
	)
	(port
		(pt 120 104)
		(output)
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(text "QF" (rect 86 97 102 111)(font "Arial" (font_size 8)))
		(line (pt 104 104)(pt 120 104)(line_width 1))
	)
	(port
		(pt 120 136)
		(output)
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(text "QH" (rect 85 129 102 143)(font "Arial" (font_size 8)))
		(line (pt 104 136)(pt 120 136)(line_width 1))
	)
	(port
		(pt 120 120)
		(output)
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(text "QG" (rect 85 113 103 127)(font "Arial" (font_size 8)))
		(line (pt 104 120)(pt 120 120)(line_width 1))
	)
⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -