From J Wiki
J6/Grid | Data Options Types | Actions Events Methods | Class DerivedClass | Hierarchical MultiDimensional MultiLine Virtual | Examples
The following keys and mouse clicks are supported by default.
Key Action arrow move active cell (scrolls to keep visible) ctrl+arrow moves to edge of grid home move active cell to col 0 ctrl+home move active cell to row 0 and col 0 end move active cell to last column (if finite) ctrl+end move active cell to last row and column (if finite) page up, down move active cell up, down by one page ctrl+page up,down moves active cell left, right by one page enter move to next cell shift+arrow extends selection ctrl+space select current column shift+space select current row ctrl+c,v copy,paste ascii characters new data for selected cell delete set numeric cells to 0, character to blank (where appropriate)
Selection Action left click selects cell left double-click set edit mode on for cell (if edit enabled) left mouse-down & hold extends selection
Key Action left,right arrow move within cell (scrolls if necessary to keep visible) ctrl+left,right arrow move to beginning, end of cell shift+left,right arrow select characters ctrl+shift+left,right arrow select to beginning, end of cell backspace delete character to left enter end edit mode, move to next cell esc end edit mode, restore original contents
Selection Action left click set cursor position left mouse-down & hold select characters