There are several icons on Kialo which appear on claims to indicate whenever unseen changes have occurred:
blue dot: appears on new claims in a discussion which you haven't clicked yet.
speech bubble: clicking the speech bubble icon opens the Comments & History section of a claim. If it is blue, there are new unseen comments.
pencil: appears on claims which have unseen edits.
recycling bin: claims which appear in grey with this icon have been deleted.
arrow from bin: indicates a previously deleted claim which has been undeleted.
arrow from square: the claim has been extracted from another discussion.
upwards arrow: the claim was moved away from this location.
downwards arrow: the claim was moved to this location.
linked chain: the claim was linked in this location.
dot pointed list: two or more unseen changes have happened.
If a claim is “stacked” (i.e. you can see another card underneath the claim), there are child claims located below it. If the card underneath the claim is highlighted in blue, there are unseen changes located in the children claims.
Additionally, claims can appear highlighted either grey or yellow: