If you want to preview what your course looks like before officially publishing your course or saving the content you've added to that course then you can do that easily within Member App.
Select the course you'd like to preview.
Click on an icon with three dots. A secondary menu will drop down. Select 'View as a student'.
You will be redirected to your membership website preview.
You can also preview your course while editing its content. To do it, select a course you'd like to preview and click on 'Edit Content'.
You will be redirected to the content management page. In the top right corner you will see a 'preview' button. Click on it.
When you click preview you'll then be able to login to your course as if you were a student and see a full preview of how the course will look.
If you are happy with the preview then you can go back to the course creation page and click the 'Save' button to confirm and update any changes you've made.