To edit space

Select a space or multiple spaces in selection set. The Modify tab dynamically turns Modification > Modify Selected, making the Modify tools available on the contextual ribbon.

Select

Modify Properties.

The Edit Space dialog opens.

Tip: To edit a single space, double click the space shape.

Select to apply a different Space Type from the list.

Check the property to edit by click in the Apply/Edit column.

The checked property value can be edited by:

choosing a value from the option menu,
OR
entering a value in the text editor field.

Checking Apply Space Type Defaults, overwrites the changed values with the default values of current type.

Enter a data point to accept the edits to current space(s).