You can easily control the time text will be shown on the screen with the text delay feature. To use it, make sure the text has multiple lines in a single group:

First, select your text group. The fastest way to do this is to click on the timeline:

If the text is grouped, you'll see the text delay parameter on the right of your screen:

The selected value will be applied to all text lines. Each one will be shown with a specified delay after the previous line. The first line doesn't affect by text delay.

The actual delay value depends on how long the text is displayed on the screen. For now, we show 1.5 seconds as the max value, but you can change it manually.

Make sure the text is shown for long enough. For instance, you can't use a 2s delay with a text block that contains 4 lines which are displayed for 5 seconds. In this case, 1st line will be shown immediately, but the other 3 require 6 seconds with this delay value. To make it work, just extend the text block duration:

When it's done, just type the number (no “s” needed) and press Enter:

That's it!