This is correctly reporting A4 with an 8px non-printable area around the
edge:

8.27 × 11.69 inches     8.27    72      595.44
210 × 297 mm    11.69   72      841.68

        
        
        
        
8,8,834,587     834     8       842
l,t,r,b         
        587     8       595


A4 is 210 x 297mm which is 8.27 x 11.69 inches at 72px per inch is ~842
x 595 (rounding off)
Take the Right coordinate of 834 ad add 8 and you get 842 and the Bottom
of 587 and add 8 and you get 595


On 7/1/2017 2:58 AM, Terence Heaford via use-livecode wrote:
> Thanks for your explanation. It does seem logical.
>
> But where does 587 come from in 8,8,834,587 ?
>
> A4 is 553.
>
> Thanks
>
> Terry
>
>
>
>> On 30 Jun 2017, at 20:56, Bob Sneidar via use-livecode 
>> <use-livecode@lists.runrev.com> wrote:
>>
>> Almost no toner based printer can do this. It's called Full Bleed, and think 
>> about what happens to the excess toner that has to go off the edge of the 
>> paper to do that. Ink based printers are designed to do this because they 
>> can just catch the ink that gets oversprayed, and you can clean/empty the 
>> waste ink container periodically. Toner is different because the paper with 
>> the toner has to travel through the fuser, and then what doesn't get fused 
>> gets picked up in the waste toner bin AFTER the fusing process. The toner 
>> that gets left behind on a toner based printer has to have some means of 
>> being collected. 
>>
>> There are a few production based copiers that can do this, but they are made 
>> to do it. Most other printers are not. 
>>
>> Bob S
>>
>>
>>> On Jun 30, 2017, at 12:48 , Paul Dupuis via use-livecode 
>>> <use-livecode@lists.runrev.com> wrote:
>>>
>>> Some printer can not print right to the edge of the paper. I believe
>>> that the numbers you are seeing reflect the physical limitation on the
>>> edges of this particular printer.
>>
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