You can edit multiple session files simultaneously to make mass edits to several sessions' properties.
In the Sessions Dialog Box or the Session Manager, select the desired multiple sessions by using mouse drag, Shift+Mouse-Click (to select an area), or Ctrl+Mouse-Click (to select individual sessions).
By selecting ‘Tree View’ as the ‘View Type’ you can select sessions spanning multiple folders. Sessions in unopened folders will be excluded from your selection.
Properties marked as ‘###’ means that this property has differing values across your selected sessions. Modifying this property will apply the same value across all selected sessions.
Click ‘OK’ to save your changes. Changes are applied to all selected sessions.