Arrow keys | Move the ruler by one pixel. |
Ctrl + Arrow keys | Move the ruler by five pixels. |
Shift + Arrow keys | Resize the ruler by one pixel. |
Ctrl + Shift + Arrow keys | Resize the ruler by five pixels. |
Alt + Arrow keys | Dock the ruler to screen boundaries. |
'L' | Set marker at current length. |
'C' | Remove the first custom marking line. |
ESC | Exit Screen Ruler/ Help window. |
See more keyboard actions in context menu. |
Click on a position where a marker is set | Open dialog to view/ delete marker. |
Double-click on ruler | Set marker at the clicked position. |
Mouse wheel | Resize the ruler. |
https://screenruler.sourceforge.io