**Product and version:**
- VMware Workstation **Player 25H2** (exact build/build number if needed)
- **Host OS:** Windows 11 Pro 25H2, build 26200.7462 (x64)
- **Guest OS:** Windows 11 Pro 25H2 (x64)
**Hardware / Display setup:**
- **CPU:** Intel Core Ultra 7 165H
- **GPU:** Intel Arc Graphics + NVIDIA RTX 500 Ada Generation Laptop GPU
- **Monitors:**
- 1 × 1920×1080
- 2 × 2560×1440
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### Summary
In **VMware Workstation Player 25H2**, the **multi‑monitor layout** feature only works when the **Color Theme** for the Player UI is set to **"Light"**.
With any other Color Theme selected (e.g. Dark or System), the multi‑monitor layout selection combobox is visible, but changing the layout has no effect on the guest display.
The same VM on the same host works correctly in **VMware Workstation Pro 25H2**, regardless of Color Theme.
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### Steps to reproduce
1. Start VMware Workstation **Player 25H2** on the Windows 11 Pro 25H2 host (build 26200.7462).
2. Go to **File → Preferences → Color Theme** and select **Dark** (or any non‑Light theme).
3. Open a VM that has:
- **VM Settings → Display → Use all displays in full screen** enabled
- VMware Tools installed in the guest OS (Windows 11 Pro 25H2).
4. Put the VM into **Full Screen** mode on a system with 3 monitors:
- 1 × 1920×1080 and 2 × 2560×1440, driven by Intel Arc Graphics + NVIDIA RTX 500 Ada laptop GPU.
5. Use the **multi‑monitor layout combobox** (or menu options) to select a layout that should span or rearrange multiple displays.
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### Expected result
- When changing the multi‑monitor layout, the guest desktop should be redistributed across the selected physical monitors according to the chosen layout (e.g. span two or three monitors, change which monitor is primary, etc.).
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### Actual result
- The **multi‑monitor layout combobox appears** and allows selection of different layouts,
- but **the layout change has no effect** on the actual guest display:
- The guest remains on a single monitor, or
- The arrangement does not change at all, regardless of selected layout.
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### Workaround
- Go to **File → Preferences → Color Theme** and set the theme to **"Light"**.
- Restart VMware Workstation Player.
- After switching to the **Light** theme, the **multi‑monitor layout works correctly** in Full Screen for the same VM and same host setup.
---
### Additional notes
- The issue appears to be **specific to Workstation Player 25H2**.
- The same VM on the same host with the same monitors works as expected in **Workstation Pro 25H2**, regardless of the UI Color Theme.
- This looks like a **regression or UI‑related bug** that ties the multi‑monitor logic to the selected Color Theme.
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