Generally presentation files gets bigger in size due to the insertion of large image files. Though in older versions of PowerPoint there was no provision of image compression but this is not the case with the recent versions of the PowerPoint. Recent PowerPoint version can compress the images thereby bringing down the size of presentation files.
Now for reducing your presentation file size up to 50 % just follow these three simple steps.
– Try reducing the resolution of the images in your presentation, this will amazingly bring down the presentation file size. Images at lower resolution wouldn’t print that good as they they would print with higher resolution but there is no point of keeping higher resolution images in your presentation as long as screen is your primary viewing medium.
– Avoid using BMP & TIFF files, use JPEG, PNG, GIF. PNG & JPEG have good internal compression mechanisms.
– You might have noticed sometimes while working on your presentation that file size gets bigger, well this is due to auto saves. So for avoiding this save the file by going to “Files” and then to “Save As”.