Assuming you add the TV and the cable box from the Sofabaton App database correctly, and your cable box is attached to TV's input HDMI 1, you can use "reassign remote key" to assign a button for TV's input HDMI 1. From the App, you can select cable box, select remote keys, pick a key to customize on the App, for instance, click on the input/source key (the key up above the infor key on the right), select "Reassign Remote Key", click on the TV on the left side list, then look for input HDMI 1 on the right side, which is the function list for the TV. Click on input HDMI 1 once you find it, then click Done. Lastly, Back to devices on the App. On the U1 remote, use the wheel select your cable box, then press the input/source button to go to TV's input HDMI 1.

You need to create an activity for that first. For example, if you have a TV, a cable box. You need to create an activity by selecting the TV and cable box. After you set up the activity, then go to edit the activity, select "Keys Collection", select Macro keys, then Add favorite key, give a name for the Macro button, then add a command, select a device (your cable box), select a command, select 4, confirm, and save. That's for channel 4. Following the same steps, add another favorite key, name the 2nd macro button, add a command, select the cable box again, select a command as 5, confirm, then keep going to add a 2nd command, select the cable box, select no. 1 as the command, confirm, then add the 3rd command as no. 2, and save. And that's channel 512 After the remote is sync, you press the wheel on the remote to turn on the activity, after it becomes green, then press the wheel again, it will show you the channel 4 and channel 512 on the screen. Use the wheel to select, and press the wheel to go to the channel you want to watch.