General Toolbar in MarvinSketch

	Rectangle Selection	Allows selection in rectangle mode on mouse drag.
	Lasso Selection	Allows selection in lasso mode on mouse drag.
	Structure Selection	Allows selection in structure selection mode on mouse drag. With this selection mode only whole fragments can be selected.
	Erase	Removes all structures upon selection.
	Undo	Reverses the last command or the last entry you typed.
	Redo	Reverses the action of the last Undo command.
	Cut	Removes and copies the selection to the clipboard.
	Copy	Copies the selection to the clipboard.
	Paste	Inserts the contents of the clipboard at the location of the cursor, without replacing selection.
	Check Structure	Checks and corrects chemical structures. See Structure Checker User's Guide for more details.
	Zoom In	Increases the canvas's magnification.
	Zoom Out	Decreases the canvas's magnification.
	Zoom Tool	Changes the canvas's magnification to a specific value. It can also do autoscale using named values: All, Selection. This is supplemented with 'Scaffold' and R-group(s) when there is a defined R-group on the canvas.
	Help Contents	Shows MarvinSketch User's Guide.