In photoshop, you can setup your image size by going to Image menu and select canvas size and choose inches and type in your dimensions and the screen will change accordingly to the new size when doing your artwork..
True, this is where you kind of have to use the Resolution formula in regard to what your final size will be, but if it's mainly for Screen printing or heat transfers, i would do full size layouts at 72 dpi should be fine as long you're not scaling small images upward to fit your final size print.. Scaling large images downward to your final size will never cause resolution issue is just the scaling up of small images to fit your final output size that will cause pixelation and loss of sharpness..thank you darksider> appreciate the help> i have read that large printing can compromise image quality. was some what familiar with canvas size. just was concerned as far as larger prints and image scaling in relation to fonts and things of that nature
If you're working at full size dimension then 72 dpi is fine as long you're not gonna be scaling up the artwork in Photoshop.if you're scaling larger High res images downward, like i said earlier it should be fine.WAIT!!!
72dpi is a HUGE mistake for screen printing or heat transfer. Anything less than 150dpi is horrible. If your computer can handle designing at 300dpi that is best.
Another question for all of you good folk out their in t-shirt forum land? why is it that when i save an image and open the file the image appears to be smaller in my layout? the image size/canvas size option display the size as the same but onscreen it appears smaller?