This action allows to show or hide some objects when the left mouse button is pressed on the object at run time.
To use this action:
| a) | click a checkbox Show/Hide object 
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| b) | select an object to show or hide from the list of all objects 
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| c) | add it to the list of selected objects  by pressing the ( ) button
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To add a few objects, repeat the b) and the c) operations.
The list of selected objects has two columns:
| Action - shows how the object state will be changed (shown or hidden). To switch the action press the  checkbox.
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| Object name - shows the object name.
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If you don't want to restore the object state when the left mouse button is release , enable option «Don't restore a state of object».
Available for: polyline, rectangle, ellipse, text , cool text , image, hotarea.
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