Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Assuming you are using Pub 2010 you can select the image and the 'Picture tools' tab will show you the option that are available to you with Publisher. Unfortunately you will not get all the same options as you find in some of the other Office programs. This is as it always has been. Publisher has always been the 'neglected adopted step child of the Office family'.
If you would like to tell MSFT what you think: Give Feedback for Microsoft Office 2010
http://mymfe.microsoft.com/Office/Feedback.aspx?formID=375
Personally I think you should be doing your image editing in a third party image editor that is specifically designed for such things. If you don't have one then there are even good freebies such as irfanview and paint.net. None of the image editing tools in any Office app can compare.
DavidF