Read more on blogspot

To cut a part of your posts and show Read more ... :
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on the part of text that you want to hide,
write < ! -- more -- > {without space}

To change " Read more " :
click Custumize at the top left corner of your page
click Layout >> then click Page Elements
at Blog Post , click edit
at Post page link text: put words that will be shown (eg. Readmore or Next)