Keyboard shortcuts

View modes (main viewer)

Key	Action
`←` / `→`	Go to the previous / next image
`Space`	Switch between the main viewer and the ortho viewer
`V` (hold)	Temporarily show the visible image while held (release to return to the previous mode)
`Ctrl` + `C`	Copy the current view image to the clipboard
`Ctrl` + `S`	Export the current view image to a folder
`Ctrl` + `A`	Select all thumbnails in the image list

Key	Action
`Shift` + mouse move	Hold Shift and move the mouse over the image to adjust the temperature display range (no clicking needed). Left/right = slide the range, up/down = widen or narrow it (center preserved)
`Shift` + wheel	Widen or narrow the temperature span (same as up/down movement, center preserved)
`Ctrl` + `0`–`9`	Apply a temperature span instantly (1–9 = that many °C, 0 = 10 °C, center preserved)

Key	Action
`Delete`	Delete the selected measurement
`Enter`	Finish the polyline / polygon being drawn
`Esc`	Discard the measurement being drawn (the tool stays selected)
`Ctrl` + `Z` / `Backspace`	Undo the last vertex while drawing (polyline / polygon)
`Alt` (hold)	Constrain drawing: horizontal/vertical for line tools, perfect square/circle for Box/Circle