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Here are some hints to make efficient use of the ONELAB graphical user interface:

• Numeric variables can be changed quickly by dragging to the left (decrease the value) or to the right (increase the value)
• After editing a variable by hand, immediately press return to record the change in the database
• You can toggle mesh display on/off by double-clicking in the graphics window, or by clicking on O in the status bar. The quick access menu also provides links to access all the other display options
• To reset the zoom, click on 1:1 in the status bar
• Check/uncheck the views in the Post-processing subtree to show or hide them. Shift+click will select only that view and hide all others.
• Click on the little triangle to access the options of a view, or to remove it.

See the Gmsh reference manual for additional information.