Step 1
Access your VPS via VNC in VPS Control Panel. Please refer: https://www.vpsmalaysia.com.my/system/knowledgebase/59/View-VPS-via-Control-Panel.html
Step 2
Right click on VPS desktop and choose Screen Resolution
Step 3
Click "Make text and other items larger or smaller"
Step 4
Choose your preferred size to change to and click Apply
Step 5
Access VPS once more via Remote Desktop Protocol. Icons and text size is now changed.