If you need to add images to your app, you have several ways to do this depending on whether or not you need to obtain the url of the image.
On one hand, you can directly upload the file from the image upload button of the particular feature you are working on.
However, if the feature asks you to enter the url of the image instead, then you will need to do it as follows.
Go to the left hand side menu of your platform and click on > Get images URL
Once inside, simply drag and drop the file into the uploading box or click browse to select the image directly from your computer.
In just a few seconds, a url will be generated and then you simply have to copy and paste it wherever it's required.
As you can see it's very easy.