Consider Adding Edit button on Site Editor frist screen

While testing, I had difficulty entering canvas edit mode from canvas view mode. I thought I have to first select the template or template part from the sidebar to start editing style. But I come on Site Editor to change the style, not the template’s layout.

After a couple of tries, I realize if I click on the theme area, I could enter into canvas edit mode. While hovering over the theme area, the mouse cursor shows Arrow Cursor; as this area is clickable, it should suppose to show Hand Cursor. It will be easy for users to realize it’s a clickable area.

How about adding Edit button on Site Editor frist screen. Such as

I am not sure WordPress had this button before or not.