To link a project, enter the settings by clicking the gear icon in the upper right.
You should be seeing the
WORKSPACE settings pane; if not, you can get there by clicking the
WORKSPACE tab in the top left.
From here, there is a section labeled
TRUFFLE PROJECTS. Beneath this box, click the button
ADD PROJECT. A file selection popup will appear. Navigate to the folder of your Truffle project, and select the
truffle.js configuration file. The file you pick must be either named
truffle.js for Ganache to correctly load it.
After selecting the file, you'll see it listed in the
TRUFFLE PROJECTS section.
You can add multiple projects to a workspace. After you're finished with adding projects you can click the
SAVE AND RESTART (
SAVE WORKSPACE if this is a new workspace) button in the top right.