Use this tab to suppress the display of an alignment and its labels for a range of chainages.
Click to add a new mask region. You are asked to specify the start and end chainages for the region.
Click to remove a mask region selected in the table.
Identifies the mask region along the alignment.
When selected, the mask is applied; the mask region does not display. When deselected, the mask is removed; the region displays. A deselected mask remains in the table for future use.
Click to set the start of the first mask region at the start of the alignment.
Displays the alignment chainage at which the mask region begins.
Click to set the end of the last mask region at the end of the alignment.
Displays the alignment chainage at which the mask region ends.
Use this space to add text notes about the mask region.