You can use programs like photoshop or gimp to do it. If you have a photo set then you can use Arles Image(digitaldutch) to mass watermark them. You can also google "How do you watermark with a picture?"
Printable View
You can create the watermark/logo in photoshop or gimp. To have it on your live stream you can use Manycam. You have to add the watermark through the Add New Effects button. Then select Effects, Objects, then Click on your logo. You should see your watermark/logo on your stream after that.
Its in the free version.
.......
This may be a dumb question but once I download ManyCams onto on computer can I transfer it to another computer? I'm going to buy a new computer in two months but I want to buy ManyCams now. Will I be able to transfer it to my new computer?
^^Yes you can use it on another computer. You will just have to deactivate Manycam from that computer first. Click the settings button>>About>>Deactivate License