If you have worked on blogger you will realize that working on blogger is like plucking your hair one by one with hands . Agreed that it's free and has many advantages but its bugs list is endless .
Formatting images is like climbing a hill , the save does not work sometimes , 'post comment' option suddenly refuses to interact , font does not change sometimes , formatting really sucks ..... The list goes on .
Let me tackle the issue one by one . I will posts these blogger tips as in when I discover them .
So without wasting time let me show you how to enlarge images without their resolution being degraded
Go to Edit HTML link of your post .
See the below line . Change s400 to s640.
width: 400px; height: 267px;" src="http://4.bp.blogspot.com/--lbXYBos8kI/TejMTjeXQ2I/AAAAAAAAAzI/h_CXUNKlhQU/s400/DSC_2050.JPG" alt="" id="BLOGGER_PHOTO_ID_5613961571829498722" border="0"
Remove width: 400px; height: 267px; highlighted in red in the above link. Its that simple !!!
Image with s400
Image with s640
Image with s700