Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Visual Effect Graph package (com.unity.visualeffectgraph)
3. Create a new VFX Graph (Assets > Create > Visual Effects > Visual Effect Graph)
4. Open the newly created VFX Graph
5. Click on the right side of the documentation dropdown in the VFX Graph window
6. Observe the VFX Graph window

Actual results: Nothing happens

Expected results: Dropdown opens, maybe for easier usability there could be a padding introduced on the right side, as the window resize cursor can also impact the user experience

Reproducible with versions: 2023.1.0a3, 6000.0.72f1, 6000.3.12f1, 6000.4.1f1, 6000.5.0b2, 6000.6.0a2

Tested on (OS): MacOS Silicon Tahoe 26.3