Any Photoshop experts who can help me , please?

[Mython]

Hi,
 
apologies that this is not Head-fi specific but I am a regular contributor here and I can't find the info I need by Googling, so I'm hoping one of you may be able to assist me!
 
 
I know how to print a picture to a specific overall size.
 
However, what I need to do is print a picture whilst ensuring that one specific part of that picture will end up being printed at an exact size (without having to crop that part and print it seperately from the rest of the picture). Obviously, I mean that the other parts of the picture would scale, too, to the same extent, but the point is that I need to make sure that one particular part will end up meeting my requirements for a final printed size.
 
It's difficult to explain, but let's say I had a photograph and in that photograph there was a house. How can I precisely make Photoshop print the whole picture so that the house ends up being printed exactly, say, 6 inches wide.
 
At the moment, I'm wasting paper and ink by having to experiment with loads of subtly different sizes, one after the other.
 
What would be great is if there was a tool within Photoshop that would allow me to select an exact distance on the photograph (so lets say I'd touch the mouse cursor on the lefthand edge of the house, and then touch the mouse cursor on the righthand edge of the house) and then tell Photoshop to scale a printout so that the distance I defined with the two mouse cursor points will end up being printed at the exact physical printed size I desire.
 
I'm trying to make a scale model, and I therefore need to print certain parts to a precise size, so I can cut them out and match them to other components that were printed from different views/photographs.
 
 
Sorry, I'm getting tongue-tied trying to explain myself, but I hope that makes sense!
 
 
Any assistance greatly appreciated!
 
Thankyou
 
 
.

 

[TMRaven]

Photoshop has rulers you can bring up in the view menu drop down.  After you get the rulers set you can drag guides from them to the edges of your house, and make sure it's the size you want.
 
Your print will print out at the exact dimensions of what you set it to under the image size option, but you need to make sure the paper is big enough so it'll take the full-size of the print as well as borders.  Not many printers can print borderless.
 
If you want need more help you can send me the original file and I can do what you want with it.

 

[billybob_jcv]

I think you could also crop the picture to just the area of the house. Then resize it so that it gives you exactly the print size you want, and see what % was required to get that. Now go back to the original picture and apply that same % of resize and print it.

 

[Mython]

  Photoshop has rulers you can bring up in the view menu drop down.  After you get the rulers set you can drag guides from them to the edges of your house, and make sure it's the size you want.
 
Your print will print out at the exact dimensions of what you set it to under the image size option, but you need to make sure the paper is big enough so it'll take the full-size of the print as well as borders.  Not many printers can print borderless.
 
If you want need more help you can send me the original file and I can do what you want with it.

 
 
Thankyou,
 
I'll try what you've suggested.
 
 
Appreciate the help!

 

[Mython]

I think you could also crop the picture to just the area of the house. Then resize it so that it gives you exactly the print size you want, and see what % was required to get that. Now go back to the original picture and apply that same % of resize and print it.

 
Funny you should say that - that's something I tried earlier this evening, after I posted. Still a PITA, but it does work.
 
Thanks for the suggestion.
 
I'm going to have to learn the rulers method, but I'm OK with learning it, since it will come in handy, again & again, in the future.