i would like to know how to edit a binary file in ida pro (i just need to change one instruction!) (its ARM binary) thanks

Possibly edit: idagui.cfg: DISPLAY_PATCH_SUBMENU = YES If the menu is not enabled, then use Edit/Patch code/Change Byte

<ol> <li>select the instruction you need to change in "IDA View" subview. <img src="https://i.stack.imgur.com/HrofK.png" alt="enter image description here"></li> <li>switch to "Hex View" subview. You will see several highlighting hex numbers. <img src="https://i.stack.imgur.com/Y9O9S.png" alt="enter image description here"></li> <li>press "F2", edit it, when you finish, press "F2" again. <img src="https://i.stack.imgur.com/riXrl.png" alt="enter image description here"></li> <li>That's all. you will see your change in other subviews. <img src="https://i.stack.imgur.com/dqniD.png" alt="enter image description here"></li> </ol>