Unfortunately, I don't believe Blender supports right-click panning due to the use of right-clicking for drop-down menus or selecting. However, you can change the default MMB action to pan, and Shift+MMB will become orbit.
This is probably due to viewport display settings.
Select the concerned object and in its properties panel,
go to 'object properties' tab
then 'viewport display' section
and uncheck 'wireframe' check box
There's a setting for that under Main Menu > Edit > Preferences > Navigation Tab > Orbit & Pan choose: Orbit Method: Trackball
Otherwise Blender will constrain you to turntable rotation, which does not allow full free rotation around all axes (it keeps the Z-axis upright while rotating).
I had a similar problem when at objects with two materials attached to different faces, those faces got invisible in solid mode, while being selectable and showing up in rendered(Cycles) mode. Only in 2.81, not in 2.80. Solution: new graphics card capable of OpenGL >3.3.
Another problem occurred simultaneously, but with different reason: some objects shaded ...
There could be a few things going on, but your Device in the Render Engine selection for cycles is greyed out. This could mean that your GPU is not able to be used (old or not supported) - or the preferences are not set correctly (Edit->Preferences->System).
After this is resolved, your lighting setup could also be an issue.
You parented the rig to the body.
But you should be parenting the body to the rig, so you select the body then hold SHIFT and then select the rig (in object mode) then press CTRL+P then choose with automatic weights. After that try moving the bones in pose mode.
Don't forget to let me know if that works or not.
You might have to remove the first parent to ...
You can easily rotate the view by pressing the middle mouse button and moving the mouse. To pan the view, do the same but also maintain Shift. To zoom in/out, do the same but also maintain Ctrl (or simply use the mouse wheel).
You can use the numpad keys to set the view to :
front 1, back Ctrl+1
right 3, left Ctrl+3
top 7, bottom Ctrl+7
I had the same issue, found out it was because the 3D window was not active when pushing the keypad.
I use a stylus and a pen display: leaving the display with my stylus made the pointer follow out the 3D Window, activating another.
As far as the hiding of the strokes goes, I have found a solution:
For whatever reason, the wireframe view was selected.
This problem was solved by selecting any other view in the top right corner (e.g. Solid view).
To fix the . shortcut, press N to bring a sidebar, go to View > View Lock and disable Lock to 3D Cursor
As for the rotating pivot point problem, you can change that at the middle top of the 3D Viewport.
Ps1 texture for world maps reached a maximum of 1024x1024 pixels and a lot of "sharpening filter applied, from photoshop".
If you're using such an old computer, the maximum texture will be 1280x1280 pixels for Ps1 styles. Your texture is causing the lag, yes.
Upgrade to Blender 2.79. Most of texture mip issues have been solved there as well, if you don't ...
You are asking "how I can show doublesided display" but if i'm understanding your problem correctly what you need is to not show double sided faces.
To do that open the Viewport Shading menu and put a check against Backface Culling.
Edited to add:
You appear to have a set up something like in the screen shot below:
View from below and the teath in my "...
There is a tool bar in right side, which is always there...go there in 'All scenes'..
there will be objects like plane or cube(whatever you've choose)..now, there you'll see an eye button. If it is light in color means you must have hidden the object, else you've not..
So, Go and enable it..:)