What’s with all the green and blue borders?!?
Callisto, like Jupyter Notebooks, has a modal user interface. This means that the keyboard does different things depending on which mode the Notebook is in. There are two modes: edit mode and command mode.
Edit mode is indicated by a green cell border and a prompt showing in the source field.
When a cell is in edit mode, you can type into the cell, like a normal text editor.
Enter edit mode by pressing
Enter or using the mouse to click on a cell’s editor area.
Command mode is indicated by a blue cell border.
When you are in command mode, you are able to edit the notebook as a whole, but not type into individual cells. Most importantly, in command mode, the keyboard is mapped to a set of shortcuts that let you perform notebook and cell actions efficiently.
For example, if you are in command mode and you press
c, you will copy the current cell – no modifier is needed.
Don’t try to type into a cell in command mode; unexpected things will happen!
Enter command mode by pressing
Esc or using the mouse to click outside a cell’s editor area.