If you are in the SGF editor, things work like in gGo or any other SGF editor. Left-click will play stones in alternating colors. You can switch into “Edit mode” by selecting one of the SGF marker icons in the Sidebar. Depending on which mark you have selected, a left-click will place a mark and a right-click remove an existing mark. If you select stone editing mode, left-click will add a black and right-click a white stone. To remove a stone, simple click on a placed stone and it will be gone. To return to “Play mode” again select either the white or black stone icon. You can also switch the turn with this icon, if you need to add for example two white moves.

When playing a move in “Play mode” there is a shift modifier available. Usually, when you play a move that already exists as son of the current move, glGo will instead navigate to this move and not create a new node as branch of the current move. However, occasionally you might want to force the creation of a new branch, then hold down the Shift key while clicking the move. If the current move has no son yet, then the shift modifier is ignored.

To search for a move at a certain position, Alt-click or Control-click on the board and if there is a move played at this spot within the main branch, the game will go to this node.

	Note
	Alt-click and Control-click do the same. Both are available because some Linux windowmanagers already use Alt-click so the click would never arrive in glGo.

The board can be rotated, shifted and zoomed using the mouse: Hold down the Control key and move the mouse to rotate, hold down the Shift key and move the mouse to shift the board. Use the mousewheel and hold down the Shift button to zoom the board, hold down the Control button to change the fovy angle.

The mousewheel can be used to navigate forward or backward in a game. If the right button is pressed while the wheel is rotated, the game will cycle through the variations of the current move, if any are available.