1. Open the Settings app and select Apps.
2. Next, select the app you want to adjust permissions for.
3. Click the Permissions tab.
4. Here, you will see the list of all available permissions and a toggle switch next to each of them.
5. Toggle the switch off to deny permissions and on to grant permissions for each one as desired.
6. When you are done, click the Save button at the bottom to apply all changes.