Centos : Manage LVMs With a GUI

1. Install LVM Gui
#yum install system-config-lvm 

2. Lunch LVM Gui
#system-config-lvm

3. Go to Disk Utility

Add new partition 
 

- Create and Mount new partition
- After that un-mount back the new partition

4. Go to LVM Gui back - "initialize entity" the new volume and 'Yes'

5.After "initialize entity" , Add to existing Volume Group and 'Add'

6. Use remaining free space for this Volume. Then 'Ok'

7. Can view the new total disk for lv_home

8. Done

source : https://www.howtogeek.com/127246/linux-sysadmin-how-to-manage-lvms-with-a-gui/