If you're a teacher in Moodle, then this page will tell you about the major changes affecting you in Moodle 4.3.
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Activity cards redesign
Streamlined cards
Narrower activity cards with smaller icons.
Access completion conditions from a dropdown menu.
Show more/less
Neater display of Show more/less links for restrictions
Edit links for direct access to settings
Teachers have Edit links taking them directly to the relevant completion or restriction settings.
Group icons for teachers
A group icon displays on hover for activities allowing groups.
Group mode
A modal window gives teachers quick access to group mode settings.
New Availability setting
From 'More' a new setting allows easy editing of availabilty options.
Edit availability
Teachers can quickly edit availability settings from the relevant item.