EOS 400 D/ A bit of help please

KK4SAM

I am new to Photoshop and trying to use an image from a Canon EOS400D but the DPI of the image is to low.The overall image is 3888 X 2592 @ 72 DPI .Doing the maths that's an image size of 54" X 36" .How do I reduce the size of the image and increase the DPI or am I thinking about this all wrong.
In the PS project I am trying to insert a string of Christmas lights on the image with a brush size of say 25 pix.Thanking you in advance and happy Christmas.

Kenny Logins

Ignore dpi, it isn't relevent until printing.

Print at whatever size you need, then the dpi is calculated from that.

Alltherage

72 DPI is a standard that comes from the 72 points per inch typography uses. best example is Apple which uses 72 dpi as a standard resolution.
Kenny Logins is right though that wont matte until you're sending it to or for print.

KK4SAM

Thanks lads,mixing up me dots and me pixels.

Kenny Logins

KK4SAM wrote: »

Thanks lads,mixing up me dots and me pixels.

No, you're right there. It's the inches that are missing - they only come into play when the photo is printed.