Presentation module - How to change a position of item(text/image) on slide?

How to change a position of text on slide?
To change a position of a text on selected slide, open "Slide settings" dialog and click on text on slide to select it. Move cursor of mouse over orange border around text field where the cursor changes appearance like showed in the picture underneath.

Left click on border edge and with pressed button on mouse move text field to direction you would like to place the text;

How to change a position of image on slide?
The position of image can be changed the same way as position of text.
Moreover, the position of image can be set manualy with selected image on slide(there is orange border with 8 resize handle squares) in Selection tab. Fields X and Y are for this purpose. The position X is countent in percentage relative to slide width. If X=50 then left edge of slide is positioned in the middle of the slide. If Y=0, the image is placed to the top of the slide.