You can set the properties of objects in RS Draw using the Tool Options area.
The Tool Options area includes the Lines Properties, the Fill Properties, the Points Properties, the Angles Properties, the Text Properties and the Color Properties. The properties that will be available will vary depending on the selected object (text, line or a shape).
The functionality of this area changes depending on what is selected on the Draw toolbar. If the Select tool is active, any changes you make are applied to the currently selected object. If any other tool is active, then any changes you make will be used as the properties of that tool the next time you use that tool to draw something.
For example, to set the default options for all rectangles, you would first click the Rectangle icon and, in the Tool Options area, set the property values that will be applied to all further instances of the items of that type.
To change the properties of an existing object, first click the Select icon, then select the object and change the desired properties in the Tool Options area. The changes are applied to the selected object immediately after you make them. To undo the change, choose Edit > Undo.