1. How change the logo size of eVision corporate theme. Is it possible?
    Regarding the logo size changes, you should have basis knowledge of CSS, please go to the theme option Admin > Appearance > Customize > Theme options > Advanced :http://doc.evisionthemes.com/evision-corporate/#item_sub4_7 and add your custom style there to increase / decrease the size.
  2. How to add front page slider at inner pages?
    For now there is no such option for slider to appear on inner pages in free theme. Anyways, if you need that feature, please do purchase the PRO version of this theme.
  3. Where can i Change the text (language) of the “Know more” Buttons from the Front Page?
    To change language, generally we use plugin called ‘WPML’ but for changing language of just few texts then we just function called `get_text()’. Please visit the given link & try to use it: http://codex.wordpress.org/Plugin_API/Filter_Reference/gettext
    For example to change ‘Name’ text to ‘First Name’

    add_filter( 'gettext', 'theme_change_comment_field_names', 20, 3 );
    function theme_change_comment_field_names( $translated_text, $text, $domain ) {
    
            switch ( $translated_text ) {
    
                case 'Name' :
    
                    $translated_text = __( 'First Name', 'theme_text_domain' );
                    break;
             }
        return $translated_text;
    }