If you'd like a LINK to Minitool's v9.1 Recovery Media ISO. AOMEI's ' Partition Assistant' FREE version does allow you to create Recovery Media for partition changes. v9.x of the FREE tool used to allow you to create that Recovery Media. I've used Minitool's Partition Wizard but the current FREE version, v10.3, no longer allows you to create a BOOTable Recovery Media, only the paid version. but you can only change the OS partition attributes (like you want to do) from outside of the LIVE OS using a Recovery Media of some sort usually based on WinPE or Linux. Many of the FREE Partitioning tools can do what you ask. not using Macrium Reflect that I know of. I guess I don't know where your fear of restoration is rooted. If this is what you want to do, you may now say 'OK' to the 'Drag partition' window. During this process you increased the size of your OS partition to utilize the previous unallocated space and have moved your OEM partition out to the end of the volume. At this point you have moved your previous disk's 'used' partitions onto the new unallocated disk. Step #5: drag your 'Healthy OEM partition - NTFS' partition to the remaining unallocated space. Step #4: In the 'Restored partition properties' window, add the size of your original unallocated space (NOTEd above) to the FreeSpace DropDown, then hit 'OK.' This expands your OS partiton by the FreeSPace you want to use with it. Step #3: Select the OS partition just moved to the unallocated disk and on the 'Restored partition properties' LINK. Step #2: drag your 'System drive (C)' partition to the unallocated disk.

Step #1: drag your 'Healthy EFI system partition' to the unallocated disk. You must select each partition separately on the DESTINATION volume and use the 'Delete existing partition' until the entire DESTINATION volume is unallocated (this doesn't happen until you actually finalize the RESTORE operation. Take NOTE of the size of the previously unallocated area you now want your OS partition to use. During the RESTORE operation (not afterwards), after you've selected the image you want to restore and said 'Restore Image,' you'll see your DESTINATION (or Target) disk with your previously imaged partitions on it. It's tricky but it can be done (assuming you have the (3) partitions you mentioned above in your image).

How to extend c partition