[edit] Overleaf guides

[edit] LaTeX Basics

[edit] Mathematics

[edit] Figures and tables

[edit] References and Citations

[edit] Languages

[edit] Document structure

[edit] Formatting

[edit] Fonts

[edit] Presentations

[edit] Commands

[edit] Field specific

[edit] Class files

Yes you can, using our new easy uploader - simply create a new document, and under the "files" menu you can upload files to attach to your document. See here for a list of supported file types.

Overleaf upload screenshot

You can also now 'Save to Dropbox' directly from the editor - see this blog post for more details.