On 09/12/2018 07:21 AM, Rasmus K. Rendsvig wrote:
included a "close inset" option to collapse them, but this is gone in 2.3.0.Not on my system (LyX 2.3.0, Linux Mint 18.3). If I right-click in an ERT box, "Close Inset" (accelerator key "C") is the second item in the context menu.
Paul