In the app you have easy access to all your signing requests in its own area.
On the top left corner of the dashboard, you will find the signing button which navigates you to the area. If you have new signing requests, you will also be prompted with a message about this when you log in to the application. Interacting with that will also get you into the signing area.
When you are in the signing area you can choose which document you want to sign, and the signing process will start. You can also sign more than one document at the same time by choosing the sign multiple button.
Within the signing process you have the options to complete the signing, you can reject the request, and you can also cancel the process to start it at a later stage.
All completed signature requests you will find in the history tab for future reference.