If you want to change the entry data on a sow, you go to “Sows boars”, then “Animal” and then you choose the entry layout you usually use. Here you can search for a sow number by using the green filter line, like this:  




If you do not have the green filter line present, then click on the filter-icon, shown in the green circle.  

When you have searched for the sow, you want to register new or changed data on, you simply click the data entry cell you want to change and then type in the new data.