Display a hidden switch by turning ON bit M100.
Please refer to the Settings Guide for details.
21.7 Settings Guide
Select the switch you want to show or hide. From the [Edit (E)] menu select [Animation (N)], or right-click the object and select [Animation (N)].
The animation settings screen can also be displayed as follows.
Select an object on the screen, from the [Properties] window, [Animation], [Settings], click on the ellipsis [...].
On the [Screen Data List] dialog box, double click on the [Animation] column of the object you want to edit.
The [Animation Settings] dialog box appears. On the left pane, select [Visibility Animation].
Select the [Visibility Animation] check box.
Select [Bit Address] and enter the address used to run the visibility operation.
If you want to toggle show/hide using an expression, please refer to the following:
21.10.2 Bool Expression
Select [Display When ON].