You can show or hide the layer containing the toolpaths associated with a toolchange instruction.
In the Sequence Window right-click on the toolchange
instruction.
If the instruction is in a 'group
by tool' instruction group, you can right-click on the group
(folder).
In the subsequent shortcut menu click Display
Layer to show the layer, click
Display
Layer to hide the layer.
Note that the Layers window shows the effects of your change.