The Properties Manager command is the most versatile command for modifying object properties. However, in my experience, many users aren't aware that you can access sub-selections within this command to limit the objects that you want to modify. When you make a selection within the properties manager and that selection is made up of different types of geometry, the selection dropdown will indicate the word "All (#)". This is an indicator that your selected objects are not all the same type (for example: you may have a selection made up of lines, dimensions, arcs and blocks). By clicking the down button at the right of the dropdown, you can access a subset of this overall selection.
An example of where this can be very useful is changing the properties of a schedule or parts list. Simply make a selection of the entire schedule or parts list and at the "All" level, change the properties common to all objects. Then click the dropdown and access the "Text" objects to change properties specific to the text objects and repeat for the linework by accessing the "Line" objects.