1. If you have saved a graph theme and there are "Top Tick" node under the X Axis and "Right Tick" node under Y Axis, you can check the "Show" check box and set the Major and Minor tick show to "None". This is a sample for top X axis:
2.If the theme without these node, you need to create a new one. 1) Right-click on a graph to choose Save Foramt as a Theme...
2) In the Save Format as Theme dialog, check All under Formats to Save. If cannot find this section, click the Canel edit button on the right.
3)Click on the Edit theme details button again.
4)Follow the setting as step1, and save the theme.
The the top X axis line and right Y axis line will show when you apply this theme.