Unlike the second-generation VT DSO, VT DSO-2810F does not support streaming mode. For VT DSO-2810F, the RECORD button will be enabled if you go to [Setting]>[Display] and change the Record Frame Width to 500. Then, if you click the RECORD button, it will start to record. However, the recorded data may not be continuous. In other words, there may be a gap/discontinuity between adjacent frames. If you need continuous recording, choose a second-generation VT DSOs. All second-generation VT DSO support streaming mode.