You can use the pointer tool to select existing
objects. You can select multiple objects at once to modify all at once (hold the
CTRL key down). Over the property editor at the bottom of the window you can
change selected objects. For example you may change the font or edit the text of
a text object. You can call the picture editor to edit pictures or scanned
files. At the right side of the window you find a color palette to change the
text color and the color of line objects. If objects are selected you can move them
arround, but if you click once on the selection you also have the option to
rotate the selected objects with the mouse.
In the edit menu you find functions to copy, paste and
delete objects. If you want to copy from one pdf file to another you would need
to combine both pdf files and make your copy and paste operations, finally you
can delete all pages you do not need. Call the Page manager under Page/Page Manager to combine pdf files.
You can use a grid to align selected objects when you need to move them (in
the View menu). You may also display a ruler.