Go to the club control panel and on the left-hand side of the page click on the Teams. After that, click into a specific team.
Locate the fixture you want to make a selection for and click on the Match Centre button in grey.
Then, go to the 'Team Selection' tab located across the top of the screen.
Make the team selection as you want it by selecting the names on the right hand side.
Select your desirable formation.
You can manually send prompts to your players regarding their availability and the team selection. This section is found at the bottom of the page.
Once you're happy, you can publish your team selection. To do this, select the green 'Publish' button at the bottom of your screen.