To Modify a Drawing Symbol
1. Select a drawing symbol to modify. You can use the Symbol filter to select the required drawing symbol.
2. Click Edit > Properties or double-click on the symbol. The Custom Drawing Symbol dialog box opens.
3. Under Placement, you can change the placement type.
4. Under Properties, specify the height, angle, or color of the symbol instance according to the specifications.
5. Under Origin, specify the origin as defined in the symbol definition or specify a custom origin for the symbol instance.
6. Click OK.
If the symbols are defined as Fixed, you cannot modify them.