You might also be using a pre-released version of the simulator. As this help is on our wiki, there's only one help page for all versions.
Help for simple mode
You can pan and zoom the chip graphics using
- '>' on the keyboard to zoom in
- '<' on the keyboard to zoom out
- click and drag to pan
Click in the graphics area to highlight any shape on the chip: all the connected shapes will be highlighted and the name of the node, if any, will be displayed in the chip status area at top right.