ToolbarS

Toolbars can be turned off using the network view menu.  

Edit Toolbar

This toolbar allows you to set the edit mode for the network, visible as the cursor graphic.

a Zoom in or out in the network panel.  By pressing z the one can toggle between zoom in and zoom out mode. When this tool is active, the cursor will change to a small magnifying glass with either a "+" or a "-" in the center representing the active zoom mode.  Clicking and lassoing a region of the screen can be used to zoom in to that region of the screen .  Note: Zooming and panning are only effective if autozoom is turned off. 
Pan Mode. Move the view of the network around (to actually move the network select all and drag the network). Note: Zooming and panning are only functional if autozoom is turned off.
Selection mode. Select nodes and weights by lassoing or left-clicking.
Text mode Text mode.  In this mode text can be added anywhere in the network panel.  Text objects can be subsequently edited by double-clicking on them.   Text can be formatted by right clicking on a text object and selecting Text Properties....
Wand Wand mode.  Can be used to inject activation to nodes quickly for testing.  See wand tool.

Data Toolbar 

This toolbar is for running the network, independently of the workspace.   It is hidden by default (because it can be easily confused with workspace run / step) and must be turned on using the view menu.  

Play Run network . Repeatedly iterates the network. Note that the image on the button becomes that of a "stop" button Stop. Pressing this button will stop the network. Thus the play/stop button acts as a toggle switch.
Step Step through one update cycle (Also keyboard space and S, depending on interaction mode).

Edit Toolbar 

This toolbar allows you to create and delete neurons, and change their state.

Rand Set all selected nodes (weights and or nodes) to a random value (Also keyboard R). Randomization is a uniform distribution between the upper and lower bounds set for each neuron or weights.
Eraser Set all selected neurons to 0. Weights are ignored. (Also keyboard C)
Add neuron Create a neuron at last position clicked on screen. (Also keyboard N)
Delete Neuron Delete currently selected neurons. (Also keyboard delete or backspace).

Clamp Toolbar 

These are toolbar buttons, which can be on or off, to control whether clamping is enabled for neurons and weights.  

Clamp Neuron Clamp neurons.  When selected,  neurons will not be updated.   See clamping.
Clamp Weight Clamp weights.  When selected, synapses will not be updated.  See clamping.