##  Class files

If you have a LaTeX project in your computer and want to edit it in ShareLaTeX you can do it by uploading your files.  Introduction To start using ShareLaTeX go to www.sharelatex.com. If you don't have an account enter your e-mail address and set a password, click Register and that's it, you will be redirected to the project management page where you will be guided into how to create a new project. If you already have an account, click Login in the upper right corner, then type in your email and password and click the Login button. Once you are logged in, you should see the ShareLaTeX Project Management page  Uploading a project To upload a project, all your files (images, classes, styles, bibliography, fonts, .tex sources) must be in a compressed .zip file. In the Project Management page, click New Project and in the drop-down menu click Upload Project. A box will appear, there you can drag and drop your .zip file or click Select a .zip file to open a file browser and locate it. Once you drop your file or select it in your file browser you will be redirected to the editor, where a new project will be created with the same name as the .zip file. After that you can start editing, click Recompile to render the PDF.  Limitations on Uploads Individual uploads, of .zip files containing projects or of individual files, cannot exceed 50 MB in size. There is no limit on the total size of a project, however, so if your compressed project exceeds this it might be possible to upload all of the contents item by item. For a .zip file to upload properly, It can only contain file types that can be processed by a LaTeX compiler: plain text files and images in .eps, .pdf, .svg and . png formats It cannot have more than 2000 individual items in them (this is the maximum number of items for a project on ShareLaTeX) It cannot contain more than 5 MB of material which can be edited on ShareLaTeX (this is the maximum editable data for a project on ShareLaTeX) While the ShareLaTeX editor can edit any plain text file, only uploads with the most common LaTeX file extensions (.tex, .bib, .cls, .sty, ...) will be editable on the site. This means you can upload, for instance, large .csv files for use with Rtex without using up your 5 MB editable data allowance. If you need to edit a file with a different extension on ShareLaTeX, it is best to copy and paste its contents into a new blank file on the project and save this with the extension needed or to upload it with the extension .tex and change it once online.