Wiki-Usage.md

+### To add an image:
+
+Clone wiki repo. Add image to images directory and commit image. Push changes.
+
+I added `logo-osc.png` to this. I can show that image using a relative reference:
+
+`[[images/logo-osc.png]]` will do this:
+
+[[images/logo-osc.png]]
+
+To make it smaller:
+
+`![Alt Text](images/logo-osc.png "Logo title text displays on hover")` will do this:
+
+![Alt Text](images/logo-osc.png "Logo title text displays on hover")
+
+