Click on the "Contents" icon on the left side of the main menu. The main menu will be replaced by a palette. There you have the possibility to select different content types.
Click on the "Buttons" icon. A new palette will appear and will allow you to select different predefined buttons.
3. grab the button you want to create with the mouse and drag the element from the palette to the place where you want to insert the new button.
You can then edit and customize the button, for example, change the text, add a link and much more.
You can of course overwrite the settings for the selected content at any time by editing the content with the corresponding dialog.
Important: When you drag content onto your page, make sure that the placeholder appears in green. This shows you that you are in the content area. If the placeholder is blue, it means you are trying to drag content to the sidebar or footer.