thanks for all the replies. seems that it's bug in win7.
tried paint.net 3.5.4 in both winxp sp2 and win7 home premium.
dpi setting worked in winxp sp2, but NOT worked in win7 for PNG/TIFF format
can any bro confirm this?
just found that DPI setting also works with JPG.
the summary:
BMP/JPG: customizable DPI
PNG/TIFF: fixed 96 DPI
is there any options that are configurable in paint.net?
yes. that's where i changed the DPI. i'm using paint.net 3.55 (downloaded from getpaint.net) in win 7 home premium.
on my machine, DPI setting only works while saving into BMP. 96 DPI is used while saving into PNG/TIFF.
well, i also tried with BMP. finally it worked and saved the image in 300DPI. is it a bug in paint.net? it seems the program ignored the setting of DPI while saving into the format other than BMP.
I copied and pasted an excel chart to paint.net, then resized the DPI to 300 and saved as TIFF. but found out that the saved tiff image was of 96 DPI in fact. is it a bug or anything that i did wrongly?