In your first message you indicated you had outputs appearing in the plugin, so I thought you knew to add new ones in PG3x Elk plugin Configuration.
Go to PG3x, Elk Plugin, Configuration tab and you will see the help notes:
To Configure the ELK Nodeserver
Set outputs to the range of outputs to include
Example:
You should be able to create a program similar to this test program:
Test F Key - [ID 0067][Parent 00B1]
If
'Area 1 / Keypad 01 MB' is switched F4
Then
Set 'Garage Light' On
Else
- No Actions - (To add one, press 'Action')
You should be able to access the Keypad F Keys as per the screen shot below:
If not, provide a screenshot of the available selections under "Condition" as follows:
Control - Area 1(if that is what you use) - Keypad-Name (if keypads don't show up under Area, what does?) - choices in drop down box.