Changing timing of a Vector object is done in the Vector propertiesdock panel.
First select the Vector object that you want to change by left clicking on it. The selected Vector has a blue outline color and a unselected Vector has a black outline color.
When the Vector object is selected the Vector properties dock panel will display the Vector object's properties.
After changing those Vector properties , click on the "Apply Vector Timing" button located at the bottom of the Vector properties dock panel. This will apply the changes to your design.
Note that if you have a multiple node Vector that each node's properties is available.
