Hi
In versions 3.xx the scrolling text is disabled. This may be a bug or oversight (probably the latter) or NCH have simply kept the option in but inactivated it as you now have to use the Motion effect to scroll the text. In effect you are scrolling the overlay Image that you create when you develop your text.
Ignore the scroll command and leave it as "None"
Having develeoped your text it will be present under the "Images" tab in the media list.
Drag this "Image" from here and drop it onto the overlay video track where it will appear as a "Text Clip"
If it is not blue or "selected" (should be) left click it.
Now left click the "Effects" tab on the toolbar.
Click "Add effect"
Select "Motion"
In this example we are going to scroll the text up the screen. This involves only the Y axis.
So..
Check that the blue blob on the red cursor line is positioned fully to left in the boxes with the blue lines. (i.e. to the start of the clip)
Set Position Y to 100% by sliding the slider fully to the right. Click the green cross to fix the position of the blue line for Position Y.
This is keyframe 1
Grab the blue blob and slide the red cursor fully to the right (i.e. to the end of the clip.)
Now set Position y to 0% by sliding the slider fully to the left. Click the green cross to fix the position of the blue line for Position Y.
This is keyframe 2
In effect you have now created 2 keyframes between which the position of the image (your text) will move from the bottom of the screen (100%Y) to the top of the screen (0%Y)
Click the < (Play) button under the display to see the effect.
Click "Close" and play the sequence line preview in the right hand pane.
Your text will scroll from bottom to top.
By using a combination of Position X, Position Y ,Rotate and Scale you can make your text move about in innumerable ways. This example only uses 2 keyframes but you can develop numerous keyframes for each motion property (they don't have to be lined up as each is independant) and create very complex movements.
It's not confined to text, the effects can be applied to any overlaid image or video.
Nat