ThaIt Iis a Big (Deal / Hassle / Pain) to Align in Powerpoint!

Hassle and pain are other words you can use.

"is" should be treated the same as words like "a", "to" or "in" in titles - either capitalise them all, or lowercase all these grammar words together.

My teacher let me make a ppowerpoint of Open Information.

I accepted the task happreciateily at first, but now I appreciate the powercomplexity of a formal ppowerpoint...

You're probably not making a literal ppt file unless you're using a very old version of office :) We don't use ppt as a general abbreviation for powerpoint.

What cost mye timhe most time?

----Alignment!

Align is the verb, alignment is the noun

I need to align the words, make sure they are ion one line and I must to pay attention to researchize the similear pictures in order tso they have the same size.

I am a pupilbeginner in making ppt in facowerpoint, I don't know how to make it beautiful or even just tidy andso I made many mistakes and corrected them.

Being a pupil has the image of being part of a group learning stuff in a formal setting.

It takesook me three hours to do one page.

How impossible it sounds,That sounds impossible, right?

Aligonment.

My work is absolutely a piece of rubbish if I dono't aligon everything...

"don't" or "do not" - if you're not abbreviating with an apostrophe, they're two seperate words

How tocan I find thewhat tricks there are to do this easily? ...

Had to guess at the meaning of this sentence

I accept the task appreciatively at first, but now I appreciate the power of a formal ppt...

“graciously” would be a better fit here rather than “appreciatively”

What costtakes up my time the most?

I get what you are trying to say, you may also say: “what requires most of my time?”

I need to align the words, make sure they are in one line and I must to pay attention to research the similer pictures in order toso that they have the same size.

“i must pay attention to research” makes sense but is too wordy and nobody would say that. instead: “i must make sure”

I am a pupil innew to making ppts in fact, I don't know how to make it beautiful or just tidy and I madke many mistakes and correct them.

i get what you are trying to say with “i am a pupil to” but it doesn’t make sense in english.
“i made” is past tense, and the rest of the sentence is in present tense

My work is absolutely a piece of rubbish if I dono't aligon everything...

you would say either:
1. my work is absolutely rubbish
2. my work is a piece of rubbish