Overleaf enables you to go from a location in the typeset PDF to the corresponding location in your LaTeX source code, and vice-versa. Note: This feature will not work if your project’s main .tex file is stored inside a folder (i.e., it must be placed at the top (root) level of your project). Several other possible causes are listed here. You can either: double-click on the PDF which causes Overleaf’s editor to scroll to the corresponding location in the source code, or use the arrow keys that sit on the divider between the source code panel and the preview panel, to jump from source-to-preview, or preview-to-source: If you don’t see those arrows, or double-clicking the PDF doesn’t work, you need to make sure your project’s PDF viewer is set to “Built-in” and not “Native”. Here is a short video showing how to set your project’s PDF viewer and demonstrating Overleaf’s source/PDF synchronization features. SyncTeX: The TeXnology behind this Overleaf feature Overleaf’s “jump to source code location” and “jump to PDF location” capability is implemented using SyncTeX, a standard feature that is incorporated in all TeX engines. Readers interested in a brief introduction to SyncTeX can find out more in this Overleaf article.