Once you have created your IR device and its been added to your Fibaro controller, you can edit this device, and choose to show only those buttons you need to use, and also change the label on the button.
On the Settings page of the plugin, click the Edit icon.
This page gives you the following options;
Rename the Button - just edit the name in the field.
Enable the Button - this tick box will determine if its included into the Fibaro Virtual device, if you do not need to use this button, just un-tick it.
Test the Button - clicking the arrow icon will send this IR action to your device.
When you have finished editing the device, click the Save & Update button at the bottom of the page. This will then update your VD in Fibaro with the changes you have made.