Another option, I believe, is to go up to Edit and click on UNDO and the last task to a track that you worked on will basically delete tahat action....there are times when you can UNDO several different tasks you just did, other times, just the most recent one.  I haven't figured out just why that is.  always try out what you are wanting to do on a dummy program file you created, that way if you get unexpected results, it isn't on the tracks you really want to keep or save.  There is also an UNDO tool at the top of tahe program that looks like a semi-circulaar arrow...one arrow is athe undo and the other arrow is a redo.  

As I am not aware of your Music Maker Version I am sharing what I do in Music Maker 16 Premium may be that will help you. In the following screen shot on track 1 on one object I want to add audio effect 10 band equalizer "Phone" I right click the object click on Audio effects and choose 10 band equalizer then from drop down menu I choose PHONE (just for this example). I prefer to click OK without using Apply button. Effect will be added on the object.

What if I do not like the effect and want to get rid of, simple right click on the desired object  then click on 10 band equalizer and click on RESET/OK. Though effect will be deleted unfortunately if we right click the object it will still show a check mark on 10 band equalizer. In reality the effect is not applied anymore. Therefore please remember that.

What if I want to add Vocoder, again right click on the object or selected objects from Audio effects choose Vocoder when Vocoder will be opened I make some settings click OK without clicking on APPLY button. Effect will be added on the object or objects.

What if I want to delete the effect. Again right click the object from Audio effects choose Vocoder and in this case as there isn't Reset I will turn off the effect click on red button on the left then click ok.

Please also note in some cases there aren't RSET or OFF buttons therefore, we have to use UNDO.

Hope the above answer will be helfpful.

Thank you so much guys for the answers! You have completed your task! Now its clear. Another question which bothers me is: is it possible to achieve good results close to proffesional using this program , or it is mostly for amateurs? I understand that in order to do something greater i need to turn to sequoya or samplitude. But nevertheles?

Thank you so much guys for the answers! You have completed your task! Now its clear. Another question which bothers me is: is it possible to achieve good results close to proffesional using this program , or it is mostly for amateurs? I understand that in order to do something greater i need to turn to sequoya or samplitude. But nevertheles?

I wish you should have mentioned your Music software name/version any way.

Achieving good result depends on your knowledge to use music software with all features. If you could not use your present software then how come you can use those professional versions. Even if you use Magix Or samplitude the soundpool are same. Therefore, first master your present software then go to professional version.

Any one can make a music track but to improve it further need some skill.

I visit the Knowledge Community everyday just to read waht kinds of problems people are having and what solutions are being offered up.  Nihons' was one of the best, you even got screen saver shots to make the answer even more clear.  I would suggest you do the same since you are in a big hurry to turn pro....and here is my take on that......Bigger, faster, louder, isn't necessarily better...its just more to learn and possibly mess up.   I have had Magix MM programs for 7  years and even tho' they don't change that much, I still have a lot to learn.  MM2013 has a ton of stuff to figure out and utilyze in making your music.  I would suspect that most people really can't tell tahe difference between music written with the various programs, they either like it or they don't...and if all else fails, just crank up the volumne.  Rule #1 in Rn'R...if you can't be good,  be loud.  Another tip I offer up to MM prople...back up your Soundpools in a separate folder or USB storage device....sooner or later you wll be very gald you did

Tip #2   Any music you try to sell, you need a licsence from Magix that costs you extra...not a lot, but I wouldn't want to see you in court for copyright infringement.  You learn these things by visitaing the Community. LOL 

Thank you once again, guys! I am using MM 2013. Just have started. What I ment, is the MM2013 capable of doing nice mastering within the program or anyway I need to use other software?