There is a very simple example task fiddleit which is used to introduce the files required to define a task interface. Run the task interface stand-alone with the command:
> ccp4i -task fiddleit
This is a more realistic example - for a program something like a simplified Refmac. Run the task interface stand-alone with the command:
> ccp4i -task demo
or, to make the demo accessible from the main window, edit the modules file $CCP4I_top/etc/modules and find the text string 'demo' near the top of the file. You should see two lines which are commented out with # characters at the beginning of the line. Delete the # characters. Run CCP4i:
Select the Program List module from the contrast colour modules menubutton at the top left of the main window and then click on the Task Interface Demo button below it.