Hide the active curve with the Curve > Hide command.
Hide all curves with the Curve > Hide All command.
Show all hidden curves again with the Curve > Show All command.
You can also hide and show the curves individually with the check boxes in the curve list.
Use the Curve > Save State... command to store a list of all shown curves in a *.vis file.
The Curve > Show... command opens a dialog box into order to show certain curves. To do so, enter a list of strings, at least one of which is part of the curve's name. Separate multiple strings by a comma or semicolon. Please note that capitalization is taken into account when resolving the names. Use the little arrow to open a list of recent entries.
As an alternative you can enter one or more *.vis files in order to restore a previously saved state. Separate multiple files with a semicolon (;). Press the ... browse button to select *.vis files. You can select several files at a time.
Select the Hide Others check box if all curves to which the filter does not apply are to be hidden. Otherwise the curves that slip through the filter will also be shown.