Paint. Seriously. Open it in paint and save as png.
Already saved file i.e, .PNG. Open the Photoshop Application , then go to file menu, and select the OPen, where u already saved file is .PNG select it click ok. it will in photoshop file .PNG the again go to file menu then click save as option the name it and format it as .GIF and click it save button.
you open the picture u wanna change and click "save as" then look for "file type" and switch to PNG
You will need to first scan your image and then save it as a file that photoshop recognizes (jpeg, tiff, png, etc.) You can then open the image from photshop (file-> open)
Open Paint on your computer, draw something, and click Save As. A small drop-down menu below your picture will let you select what type of file you can save your picture as. Choose PNG and save. (If you want a picture you took with a camera to be a PNG, open it on Paint, and save it as a PNG!)
If you mean a Windows .png file then it should already have translators for it built in. If it doesn't then you can right click (Option click) on the file and chose a program from the list.
PNG is an image file format, such as JPEG or BMP. One of the differences between PNG and JPEG, is that PNG supports transparency.
You can open .gif file in Photoshop, to convert it to another format, first open it in Photoshop then go to Save As and choose another format to save. If you cannot open that file in photoshop then See related link for free online file conversion, convert to png, jpg or tiff and you will open file in Photoshop.
Start > Default Programs > Associate filer type (2nd option) > scroll down the list until you get to .png > Click it, then click 'Change program'. Choose the program you want png files to open with and click OK.
Its not Photoshop PNG but rather PNG-8 file format. Use it to save files with limited color palette (max 256) to have file with smaller size for Web which can contain and transparent areas in image.
new mac computers use PNG to create their screen shot files - they have very small file sizes. new mac computers use PNG to create their screen shot files - they have very small file sizes. PNG is usually used for images with transparent pixels because PNG accepts transparent areas on image and jpeg doesnt. PNG is larger in size then jpeg but give better quality because doesnt compress file as much as jpeg on save.
as far as i know, the only solution is to delete the file and start from scratch.