Quote (from cholero 4/9/16):  

Cholero, You are right, I did not know that there are several types of context menus. I'll explore them. However, It seems to me that it was rather logical to seek a bookmark submenu in the context menu of the "now playing" window. The bookmarks are very important for me and one of the main...

Cholero,   Thank you for your help. I got back the ability to create bookmarks as I wanted. BTW, I had already chosen the arc-en-ciel theme in my former configuration, but (1) I did not know how to use the touch-buttons to get the context menu (2) the context menu I got with two long presses...

I had to uninstall RB. Before this uninstallation, I could create bookmarks "manually" from the context menu which I got with a long press on the central button. After having reinstalled RB (DX50Firmware_V1.9.4_with_rockbox_bl_20160126), I can get the context menu only after 2 long presses...

Thank you ....

Thank you very much mrbunch for your very detailed explanations!   I have understood that my main error was to update with the original "DX50Firmware_V1.5.0" instead of the "dx50_1.5.0_cwm" zip file. However, I could not flash the the update.img with RKbatcktool. I did not know which function...

  Cholero,   I have recovered the usage of my DX50 by installing the iBasso FW 1.50 in CWM, since I could not use the Mango update function.   However, I cannot install the Rockbox with either your zip file or (cwm_rb_dual_2014-07-30_cholero) or Bitbucket's one (cwm_rockbox_2014-06-30)...

cholero,   I have understood that I have made a great mistake by mixing DX90 and DX50!   I have finally recovered the usage of the DX50, by installing the iBasso FW 1.50 via CWM, since I could not use the Mango interface.   However, I cannot install the bitbucket's cwm_rockbox_2014-06-30...

cholero,   Thank you for your answer.   1] I have a DX50, but I used cwm_rockbox_for_DX90_port.zip to install Rockbox, as advised in a forum. 2] I have downloaded Rockchip_Batch_Tool_v1.7.      Is it what you call "rkbatchtool"?      How do I flash now (as I have already written, I have...

After having installed Rockbox on my newly acquired iBasso DX50, I have two kinds of problems: - on the Rockbox part, I can see and launch the audio files, but don't hear anything, - on the Mango part, the screen becomes quickly dripping and does not react to any of my interventions by buttons...