[Typo3-german] how can i install and configure the GDlib properly?

[zsl vincent]

Hi,
this is what i see when i click the install tool and input the 
password.obviously there is no configuration of GDlib,so how can i 
install it sodass i can use the Gmenu and Imgmenu.
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TYPO3 3.8.0 Install Tool
Site: Blank DUMMY


1: Basic Configuration
2: Database Analyser
3: Image Processing
4: All Configuration
5: typo3temp/
6: Clean up database
7: phpinfo()
8: Edit files in typo3conf/
9: About
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