If you've worked on a document before, it's saved to your profile. Here's how you can find it back and open it:

• Open your project. On the homescreen, in the left sidebar, click on Projects. Next, choose the project you made your document in and open it.

  

• The left sidebar should change and show three icons. Go to the Documents by clicking on the bottom icon.

• You should land on a screen labeled 'Your documents'. Here, you can find your document and open it by clicking on its name.

  

From here, you can continue working on the document.