The file size of the screenshot is huge !? --Why the iPhone can't be heard anymore!
The appeal and strength of the iPhone is that you can understand how to use it without reading the manual. However, there are times when you think you know it but you don't understand it correctly. In this section, we will explain in an easy-to-understand manner "why the iPhone can't be heard anymore". This time, I will answer the question "The file size of the screenshot is huge !?".
A "screenshot" that is an image file of the screen state as it is. On iOS 11, iPhone 8 and earlier models take a screenshot by clicking the home button immediately after pressing and holding the button on the top or side of the main unit, and iPhone X by clicking the volume up button immediately after pressing and holding the side button. can do. The timing of pressing the buttons is not exact, so you can feel as if you were pressing two buttons at the same time.
Regardless of which method you use, when you take a screenshot, the screen flashes for a moment and then a thumbnail (reduced image) is displayed at the bottom left of the screen. Thumbnails disappear after a few seconds, and are saved as PNG image files in the iPhone's internal storage for viewing / editing with the "Photos" app.
The large file size of the screenshot is partly due to the fact that PNG is applied to the file format when saving. PNG is a lossless image format that does not cause deterioration of image quality due to compression. Not suitable for compressing large images.
Therefore, if you take a screenshot of an app with a small background color like "Settings", the file size will be about several hundred kilobytes, but a screenshot containing an image with a large number of colors like a photo has a number of file sizes. It can reach megabytes. It depends on the screen resolution of the iPhone you are using (for example, iPhone X is 2436 x 1125), but if you attach it to an email as it is, an error may occur, so be careful.
If you don't mind the image quality of the screenshot being slightly degraded, tap the thumbnail displayed immediately after shooting. If you perform AirDrop or email attachment from the share menu on the screen opened at this time, the file size will be significantly smaller because it will be converted to JPEG format and then sent.
