Syntax: !checkgrid [c][o]This will mark vertices of objects and cells that are off-grid. The reference grid is the grid currently applied in the main drawing window. If there are selected objects, these (only) will be tested. Objects or subcells that have an off-grid vertex will remain selected, other objects will be deselected. If no testable objects are selected, all objects will be tested, or all objects on the current layer if in layer-specific mode. In either case, cells will be checked if the `c' modifier is given. Objects or cells that have an off-grid vertex will be selected, and all off-grid vertices will be marked.
Giving the !checkgrid command with the `o' modifier (or `n' or `0' (zero)) will remove the marks from the screen.