Canvas
The canvas is the inner area of the window with a lighter background, and is where the images can be placed. The canvas will expand to fit your images.
Grid
Canvas > Grid > ...
Toggle visibility and snapping to the grid.
Choose between a classic line grid or a dotted grid in the menu. Items can snap to the grid even if the grid is set to None, if Snap to grid is enabled. Shortcuts can be set for the different grid types in Settings.
Use the grid to organize items neatly on your canvas.
Optimize canvas
Canvas > Optimize
Fit the canvas snugly around all the images on the board.
CtrlAltP/⌥⌘P is Pack all and Optimize in one shortcut!
Focus canvas
Adjust the view so the full canvas is visible.
Reset camera
Canvas > Reset camera
The camera will be reset to the default position (0, 0) in the window.
Reset zoom
Canvas > Reset camera zoom
The view zoom will be reset to 100%.
Lock canvas
Canvas > Lock canvas
Lock everything on the canvas so items cannot be interacted with. Great when you don't want to accidentally move things around.
Grayscale canvas
Canvas > Grayscale
Turn everything on the canvas into grayscale.
The formula used is (r*11+g*16+b*5)/32
Turn only some images grayscale with Toggle Grayscale