Alamomi da aka samo a kan gwangwani da ƙananan ƙwaƙwalwa don ganowa da kuma dangantaka
Gyara, wanda aka fi sani da sha'awar, alamun sune Figures ko haruffan da aka zana ta hannun hannu ko takalma ta na'ura a cikin wani abu. Kalmar da ke cikin tarihin sararin samaniya da maɗaurai suna nufin alamar da aka yi a kasan wani tukunyar katako ko layi wanda aka zana don haka akwai alamar da ake gani a cikin kayan aiki ko yumbu.
Wani lokaci masana'antun sunyi amfani da wannan alamar don gano samfurorinsu, kamar yadda aka yi amfani da alama mai suna Van Briggle tare da ranar da aka nuna a nan.
Yawancin masana'antu daban-daban sunyi amfani da alamomi a wasu lokuta ko wani, duk da haka. Wasu lokatai alamar alamomi na iya zama jerin jerin haruffa ko lambobi, kamar kwanan wata da aka samo a kan ƙaddara ƙananan ƙina, kuma za'a iya amfani da su tare da wani nau'in alamar.
A wasu lokuta an yi amfani da kalmar "kwarzana" don bayyana alamar da aka kafa, ko da yake wannan bayanin yafi kowa (kuma cikakke) tare da samfurori na samfurori irin su azurfa mai daɗi fiye da nau'in nau'i da kayan shafa.