Does an additional monitor increase the work load on the laptop?

[Oban]

Laptop ThinkPad T540p
Intel Core i5 2.5 GHz
4 GB DDR3-SDRAM
256 GB SSD
39.6 cm (15.6") monitor
Windows 7 Professional

This is my back up laptop. I use my desktop PC for everyday work. Not much work but editing images, watching news on Youtube, and Facebook.

I am an amateur photographer, shoot RAW & post process the files in Photoshop cc 2021, Adobe Camera Raw.

The screen of ThinkPad is too small, 39.6 cm (15.6"), for viewing images. I need a 55.88 cm (22") screen. I am thinking to plug a 55.88 cm monitor to the laptop.

How much more extra work load does the large monitor increase to the laptop? Will it cause any issues?

Your advices please?

Thank you.

[Bruce]

will cause no issues.
technically, it will physically add more load to the graphics card as the card now has to run 2 monitors, but it would be so slight, you will not notice.

[Oban]

will cause no issues.
technically, it will physically add more load to the graphics card as the card now has to run 2 monitors, but it would be so slight, you will not notice.

Thanks.
It releases me from worries.

[Bruce]

glad to help