The Lines section of the Visibility on Photos pane controls whether 2D lines (marks on photographs) and 3D lines (or projections) are visible on the open photographs. There is also a checkbox to control whether Thick Lines are shown as Line marks on photos. Lines, Edges, Cylinders and Curves can be hard to see sometimes because they are drawn as single pixel wide lines on the screen. When the "Thick lines" check box is checked all these items displayed on all open photographs will be redrawn with a wider black background to make them easier to see. The width of the thick drawing is settable in Preferences.
Note: The Thick lines setting applies to all photo marks that use a straight line graphic, i.e. lines themselves, edges, cylinders, and shapes.
The Lines section will only appear on this pane if at least one line has been marked in the project.
When PhotoModeler is in Line marking mode the line mark type is forced to be visible.
Note: 3D items are displayed on oriented photographs only. See the section on Photo Projections for more information.