In Preview mode, you can change the settings in the Control Panel on the left.
Show Link Area
The “link area” is where you can trigger interactions. There are two options available for locating the link area during a presentation:
You can check "Always show link area" so that it will always be highlighted.
You can check "Show link area on mouse hover" so that the link area will only be highlighted when the mouse hovers over that component.
Fit to screen
If you select "Fit to screen," the size of the preview area will adjust automatically to fit the screen size of your PC or mobile device, ensuring that everything will be displayed properly.
You can choose “Device Frame” to adjust the device frames of your prototype to make it easier to test how it will behave on different devices (iPhone X, iPhone, Android, Pad). But note that this option is only available for mobile and tablet projects.