border: picture border thickness in pixels (appears in the book as a black frame).
hspace/vspace: horizontal/vertical picture shift in pixels.
width/height: picture width/height in pixels. The first box shows the original width/height. The second and the third boxes allows you to point out what picture size will be used in the book. The third box allows you to specify book picture width/height in percents with respect to its original width/height. The second box allows you to input book picture width/height in pixels.
keep ratio: if checked, the picture proportions will be kept when one of its dimensions is changed.
rb image preview: show how the picture will look like on the Rocket eBook screen.
To insert the picture into the book. Click in the Book Designer main window on the point where you want to insert the picture and press apply button.
Comment. "Insert Picture" operation can be repeated as many times as you want without closing "Insert/Edit Picture" window.
If you click in the Book Designer main window on an existed picture, you will be able to move it (by drag&drop) or to resize it (without keeping its proportions).
If you double-click in the Book Designer main window on a picture, the "Insert/Edit Picture" window will appear giving you the full access to the picture parameters. The boxes "alignment", border", "hspace", "vspace", "width", and "height" will contain the correponding parameters of edited picture. Change them as you wish and press apply. Also you can replace a picture by new one. To do this operation, browse a new picture, change its parameters if you want, and press apply. Comment. "Edit Picture" operation can be repeated as many times as you want without closing "Insert/Edit Picture" window.