The way that the current object is differentiated from other objects depends on the display scheme that you use:
To select an object, use Shift+Click. The text of the selected object is changed to a maroon color.
Ctrl+Click does not work in module windows. You cannot select multiple objects unless they are next to each other. You cannot select multiple objects in a view if a sort is applied to the view.
To select a group of objects that are next to each other, select the first object, and then use Shift+Click to select the last object.
The object hierarchy below the first and last selected objects is also automatically selected. All the selected objects must have a common ancestor to ensure that subsequent operations on the selected objects preserve the integrity of your data. So, if the first and last objects are at different levels in the database tree, additional objects are selected.
If you have a filter applied to the module, the selection includes objects that are hidden by the filter, but that exist between the first and last object that you select.