Unreal Editor lags after I put a certain amount of items in it... fix?

Development Programming & Scripting Blueprint
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1

Whenever I use Unreal Editor, after I insert a certain amount of meshes and/or make somewhat large maps, it starts to lag. Can anyone help?

Specs:
Operating System
Windows 10 Home 64-bit
CPU
AMD FX-8350 38 °C
Vishera 32nm Technology
RAM
8.00GB Single-Channel DDR3 @ 668MHz (9-9-9-24)
Motherboard
ASUSTeK COMPUTER INC. M5A99FX PRO R2.0 (Socket 942) 31 °C
Graphics
2367 (1920x1080@60Hz)
Cinema Displa (1680x1050@60Hz)
2047MB NVIDIA GeForce GTX 760 (EVGA) 40 °C
Storage
698GB Seagate ST375052 8AS SATA Disk Device (SATA) 36 °C
465GB Western Digital WDC WD50 01AALS-00LWTA0 SATA Disk Device (SATA) 38 °C
Optical Drives
ATAPI DVD A DH24AAS SATA CdRom Device
Audio
Realtek High Definition Audio

2

You can click the gear icon and find scalabilty settings and turn everything down to low. That will greatly increase performance. Also tweak more settings or disable visiblity for some of your meshes while working in the editor. Look into LOD levels for more in-game performances.