ZBrushCentral

"T" is not toggling Edit Mode

Day one New-bee here. There are times when I use the shortcut, T, to toggle into Edit mode but it doesn’t work. When this happens I also can not select the Edit icon. Anybody know what I am doing wrong?

http://docs.pixologic.com/getting-started/basic-concepts/ztools-and-edit-mode/

I get it, I must have placed more than one tool on the canvas. Thanks for the help.