WordPress.org

Can I add more then one RSS feed at same time?
No, you can add only one RSS feed at a time, this will scroll vertically in site sidebar.

Can I change the Slide Direction?
Yes, 0=down-up and 1=up-down.

Can I customize the all other appearance style?
Yes, Click on the configure button (small down triangle) for the "Scroll RSS feed" widget and here you can customize all the 'Scroll RSS feed' front end styles. See screen two.

Why my news content out of range?
In front end widget area, if you see any news content out of area or invisible, it because of height and width of the widget, so you should arrange width and height of the widget in widget configuration area to good look. In default I have fixed width: 180px and height: 100px.

Can I change the scroll manner from vertical to horizontal?
No,