Slide-down/up menu - android-studio

Hello i'm fairly new to Android development & I wanted to know how to make a slide-up/down menu by pressing on that black bar like the one in this picture.
Thank you
slide hidden menu

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Normally on an excel file, when I click the Menu button on the keyboard, the normal context menu like below first screenshot will show. However I got a new computer and it gives me a totally different context menu like below 2nd screenshot. How can I change excel to show me the context menu like the first screenshot when I click the menu button on the keyboard? Many thanks.

Why the fields are not being displayed in the disign interface when I drag and drop from the pallet?

I am a newbie, just started working with android studio.
I have created just a blank activity in which hello world text field is displayed, when I try to drag and drop Button/TextView or any other elements it's not being displayed on the screen and the screen remains gray in Design interface, but in Text interface fields were added.
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open file in new tab

Does Android Studio have the option of opening a referenced file in a new tab (like Xcode's Alt-click feature)?
If not, is there a way of creating this?
Open current editor tab in new window
Shift+F4
Even I couldn't find a way of "Duplicating Tabs". But there are two workarounds that might help:
1) Right click on a tab title and choose either Split Vertically or Split Horizontally. This can be done multiple times!
2) If for some reason you don't want to see the files side by side, there's another hack (works for me on Mac): First, right click on a tab title and choose either Split Vertically or Split Horizontally. Now, drag the extra tab (by its title) on to the title bar of Android Studio => the tab will pop out into a new window!
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Basically, when we click on a combobox near to the bottom edge of the screen, the first item of the menu begins at the same vertical position of the combobox, leaving a blank space on top of this.
This way the menu is created with the size to hold all the menu items, but since the first element of these is not put at the top of the menu, the menu has to scroll to see them.
Link to the image: http://postimg.org/image/767ukjphz/
It's not a bug in my code. The menu is created correctly. The bug is in the GTK libraries.
So, what do you suggest me?, how can I resolve this situation?, maybe moving to menu position?

How To highlight imageview using button click event in android

I m new to android Development
i have to place 3 button on screen and below that 3 image will be place below that..when i click on any button ,particular image should be highlight.
can anyone tell me how to start..i only want suggestion from where to start...
You can replace the image with a highlighted variation in the on click event.

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