HOW TO INSERT A PICTURE
1. Browse a picture with the browse button or drag&drop a picture file to "Insert/Edit Picture" window.
2. Choose picture parameters (see buttons and options section below for parameter's description).
3. Click in the main Book Designer window on a point where you want to put the picture.
4. Press apply.
5. To insert more pictures repeat steps 1-4.
HOW TO EDIT A PICTURE
1. Double click in the main Book Designer window on a picture to be edited.
2. If the picture is editable, its preview will appear in "Insert/Edit Picture" window.
3. Input new picture parameters and press apply.
4. To delete a picture either
 - select it by mouse in the main Book Designer and press "Del"  or 
 - double click on it in the main Book Designer and press delete when "Insert/Edit Picture" window will appear.
To move a picture: click on it in the main Book Designer and drag to a new place.
BUTTONS AND OPTIONS
browse: browse a picture.
alignment: picture alignment with respect to the surrounding text.
border: the thickness (in pixels) of the dark frame around the picture.
hspace/vspace: horizontal /vertical picture shift (in pixels).
width/height:
 - left gray box shows the original picture width/height (in pixels);
 - middle white box allows one to input manually new picture width/height (in percents of its original size);
 - right white box allows one to input manually new picture width/height (in pixels) .
keep ratio: if checked, the picture proportions will be kept when its width or height is changed.
rb image preview: appears when a picture has been browsed. Allows to see how the current picture will look like at the Rocket eBook screen.
html src: shows the current and allows to set a new SRC attribute of IMG tag of the picture.