Text size and margins matter more on camera than scroll speed. Together they control the line length—and line length controls how far your eyes travel while you read.
Find the display settings
On Android
Tap the Settings (gear) button in the teleprompter, or go to Settings → Teleprompter Settings; both open the same settings. Appearance contains the font, text size, line height and alignment; Player options contains margins and the reading cue.
Set text size first
Increase it until you see roughly 5 to 7 words per line.
It will look large on screen and natural on camera. Long lines make your eyes sweep from side to side, which viewers notice immediately.
Narrow the margins
Margins pull the text column away from the screen edges. Keep narrowing until the lines are short without making individual words wrap awkwardly.
This matters most on tablets and wide monitors, where a full-width text column creates a very long eye movement.
Choose a comfortable font and line height
On mobile, Display font includes easier-reading, dyslexia-friendly and monospaced choices with a preview. A little extra line height makes it easier to find the next line at a glance.
Left alignment is the safest default. Centred text moves the beginning of every line, forcing your eyes to search for it.
Set fixed scroll speed last
You only need this setting when you are not using voice-activated scrolling.
Calibrate speed against the hardest paragraph rather than the introduction. Your opening is usually the fastest part, so it gives you a misleading baseline.
Position the reading cue
Place the cue roughly one-third of the way down the screen. That leaves enough upcoming text below it if you drift slightly ahead of the scroll.