While on the Maglr dashboard, click the Settings tab at the top of the dashboard. From here you can change many settings to do with the dashboard, editors etc.
Once in the settings area of the dashboard, click the Fonts located under General on the left side of the dashboard. From here you can add new Google fonts to your already existing list of added fonts as well as remove fonts you don't need from the already selected list. From here you can also add custom fonts that you may have made yourself or purchased/downloaded from elsewhere.
Simply click on the tick boxes to the left of the fonts that you want to add to your selected list. Then click the green Use Font button under the Found fonts. This will then refresh the dashboard and the list of fonts you selected should be added to the selected list, ready for you to use inside the editors when making publication.
You can add your own custom fonts by clicking on the Own Fonts tab at the top of the interface, next to Google Fonts tab. From this interface simply click the Choose File button, this will then open the Operating Systems explorer. From here you want to navigate to your custom fonts and select it. You will then want to click the green Upload Font button, this will then upload your custom font to our servers, so you can then freely use them during your publications.
From here you can then go into the editors of your publications and use the fonts you have added freely throughout the publication.